Boiler



H. W. ZIMMERMANN.

BOILER.

APPLICAHON FILED FEB. 3. 1919.

m Mar. 15, 1921.

wizvsnfan M W/nsssas QZM @Mm of such devices, as well as to producing them economically. 7

My invention consists in the combinatlon UNITED STATES PATENT OFFICE.

HENRY W. ZIMMERMANN, orcmcrmimrr, OHIO, ASSIGNOR T0 WARE COMPANY, or MILWAUKEE, WISCONSIN, A conronerron BADGER METAL or WISCONSIN. r

BOILER.

Specification of Letters Patent. Patent d M 15 1921 Application filed February 3, 1919. Serial No. 274,372,

To all whom it may concern: 7

Be it known that I, HENRY W. ZIMMER- MANN, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Boilers, of which the following is a specification.

My invention relates "to cooking vessels and the like, and its object is to increase the reliability, efficiency and convenience of use provide for of parts and in the details of construction and arrangement of parts as will hereinafter be more fully described and claimed.

r In the drawings:

Figure 1 is a general perspective view of a cooking vessel embodying my invent on, the vessel being represented as having part of its side broken away tomore clearly show its construction;

Fig. 2 is a partial cross-section of the vessel and its lid and r Fig. 3 'is a similar section showing a modification. V 7 V I Y 'F or the purpose of illustrating my invention, I show a pot or kettle, such as is used in boiling or stewing, as being a boiler or vessel to which my invention is applicable.

This vessel or boiler comprises the lower main circular body part l which, like many other vessels of a similar character, increases in diameter from its bottom 2 upward. Its sides and bottom are preferably integral. This vessel differs from others, however, in having attached to its upper part a rather widely flaring rim 3. This rim also is preferably integral with the main part 1. The junction 4 of this rim 3 with the main part 1 is a slight enlargement of the main part 1 which leaves an internal annular shoulder or ledge 5 in the vessel some distance below Where-the rim 3' extends abruptly radially ward and slightly i upward extension from the junction part 4 succeeded by a more decided upward curvature which then merges into a radiallyoutward curvature near the top of the rim, Succeeding this last curvature and joining this upper part of the rim almost at right angles so that'it incllnes 1nwa-rdlyall around,"is the barrier" 6. This barrier 6 preferably'has the outwardly and downwardly turned bead 7 all around its upper edge, which thus constitutes the extreme upper edge of the vessel rim.

The inner rim 8 'is of relatively very short cyllndrlcal formation, preferably having formed around its upper edgethe outwardly and downwardly turned bead 9. Its lower edge is left plain and is designed to be fitted tlghtly into the annular junction part 4 of the vessel 1 with. this lower edge coming against the interior annular shoulder 5 to facilitate the tight fitting of this inner rim 8 to the vessel 1. The junction part 4 is preferably slightly radially outwardly inclined upwardly from the shoulder-5 all around the yessel, and the lower edge part 10 of the Inner'rim 8 is correspondingly inclined so that it is adapted to wedge tightly in the unction part 4 and against theshoulder 5. This inner rim 8 has perforations 11 at intervals therearound, and preferably at such a height that when the inner rim 8 is fitted'in the vessel 1', as just described, the lowermost points of these perforations will substantially The lid or cover 12 inits main part is downward and inward all around, forming a flange 13; and extending down from the incoincide with the abrupt extension of the rim 3 from the part 4.

usual formation, but has its edge part turned of such diameter that'it will fit snugly down inside the inner rim 8 with the lower" side of the flange 13 coming againstthe topof the bead 9 of said inner rim 8. The downward extent of the shell 14 of the lid or cover 12 is such that when this lid or cover 12 is pressed as far downas is'permitted by the engagement of the flange '13 with the bead 9, the shell 14 will cover the perforations 11in the inner rim 8.

Withthe cover thusfitting the vessel, the

when there is an excessive rate of such operw atio n-such as would in theordinary vessel result in boiling over, the excessive steam pressure will raise the lidfor cover 12 until its shell 14: uncovers the perforations 11; whereupon some of the steam and some of the boiling water or other liquid will escape through these perforations into the trough constituted by the rim 3. This rim or trough 3 "is high enough to accommodate the outflowing liquid in most instances. As is well known, these boilingover conditions are usuallyonly temporary; and when the con dition ceases, the liquid immediatelyfiows from the trough or rim 3 back through the perforations into the main part 1 of the vessel, and the lid orcover 12 descends and closes tliepertorations ill, as permitted by the falling steam pressure inside the vessel.

With this construction, the boiling, cooking, stewing or other operation is carried Broadly, this construction so far described is the same as that disclosed in my Patent 1 No. 1,291, 7, dated January 14:, 1919, and

is claimed therein. 1

lfhe present; construction differs specifically from; that shown in said patent in having the mainpart, 1 and therim 3 formed together, while theinnerrim 8 is formed sep arately and is preferably detachable from the parts 1 and 35., This permits more convenient and thoroughzcleaning oi the device than where such parts as the main part 1, rim 3 and inner rim 8 are permanently at tached together, leaving a sharp angle at the junction of the rim3 with the inner rim 8. However, even if the inner rim 8 is permanently fastened tothe other parts, the formation of the main part 1 and rim 3 of a single piece is an advantage in some respects, because itis more conivenient to insort or fasten, theinnerrim 8 inside these parts 1 and 3, than to secure: a separate rim or trough 3 to the outside of the inner rim 8 and main part1, where these latter two parts are fastened together or formedintegral. It will be understood, however, that any of ithese parts may be made separately and fastenedtogether, or left separable, as may be desired. i I

The inwardly turned barrier 6 at the top oi the rim .3 GODfiiiitlltBS another, difference -fr m the device disclosed in the aforesaid patent. Its function is to obstruct overflow of any greatly excessive amount of liquid that might escape through the perforations .oyerfiow or boiling over. barrier 6 or a slinilarly related part tends 11 inthe manner hereinbefore described, as might be the case upon very excessive overheating of the, vessel, or, in cooking orboiling certain substances. For instance, in the boiling of soap there is frequent excessive This inturned the liquid inwardly and downwardly where it will return to the lower part of the trough or rim 3 or will be thrown onto the top of the lid or cover 12 from which it willreadily flow back into the trough or rim 3.

' In the example of Fig: '3 the barrier 6- is detachable, to facilitate cleaning of the vessel andthe barrier. It comprises the main upper part -7 inwardly extending and of arched cross-section, and the lower vertical part 7 fitting around the vertical. part 3 of the rim 8" of the vessel 1'. Al so,'this example shows the downward inwardbeading of the barrier 6 atits inner edge 'ofits part 65, which in some cases. more eifectively deflects overflow back into the lower part of the trough or rim3.

While certain constructional details; are

dcemednpreferable inconnection with my invention, and I have shown and described these rather specifically :1 elu-c1dat1ngthe construction: and use of my inventiomias is required, I- do not'wish to'be understood as being limited to. such precise show-mg and description, but having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is: V

1. In a boiler or thelike, a container to contain liquid for boiling, haying a wall with an opening therethrough, a trough outside said wall to catch said liquid coming from said container and return said liquid to said container through said opening, a barrier on the rim of said trough to obstruct overflow of said liquid front said trough, and a cover for said container'having a part fitting down across said opennig, said cover being adapted toibe forced up to withdraw said part' from said opening; 1

2. In a boiler orthe like, a container comprising a main lower part having a bottom,

and an outwardly and upwardly extended outer rim attached to said main part, and

an inner rim having-a tapered lower part,

the junction of said main part and said outer rim being vflared lupwardly, and said tapered lower part of said inner rim beingadapted towedge in this upwardly flared lower part, the junctionofsaid main part with said outer rim being 'flared upwardly,

and said tapered lower part of said inner junction, whereby said outer rim constitutes J 1 -.oluter rim integral with said'main part, and 7 an inner rim having adownwardly tapered rim being adapted to wedge in this junction, whereby said outer rim constitutes a trough around next to said inner rim.

4. In a boiler or the like, a container comprising a main lower part having a bottom, and an outwardly and upwardly extended outer rim integral with said main part, the junction of said outer rim and main part being offset outwardly from said main part, whereby an internal annular upwardly facing shoulder 'is formed in said main part, and an inner rim fitting down in this junction with its lower edge against said shoulder, whereby said outer rim constitutes a trough around adjacent to said inner rim.

5. In a boiler or the like, a container comprising a main. lower part having a bottom,

and an outwardly and upwardly extended outer rim integral with said main part, the junction of said outer rim with said main part being ofiset outwardly from said main part whereby an internal annular upwardly facing shoulder is formed, and said junction flaring upwardly from this shoulder, and an inner rim having its lower part downwardly tapered and wedging in said upwardly flaring junction with the lower edge of said inner rim against said shoulder, whereby said outer rim constitutes a trough around adj acent to said inner rim.

HENRY W. ZIMMERMANN. Witnesses:

JAMES N. RAMSEY, CLARENCE PERDEW. 

